Steps to reproduce:

1. Open attached project
2. Open scene "Main"
3. Run it
4. Notice line: Scene Cam(Clone) - OnRenderImage counter: 1. This indicates that OnRenderImage is called once
5. Build and run project
6. After scene is loaded close build and open output_log
7. Notice line: Scene Cam(Clone) - OnRenderImage counter: 2. This indicated that OnRenderImage is called twice

Reproduced with: 5.4.0b8, 5.4.0b24, 5.5.0a2
Not reproducible: 5.3.5p7, 5.4.0b7